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20. Which of the following is a method of purifying water? A. Adding iodine B. Freezing C. Aeration D. Fixation
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20. Which of the following is a method of purifying water? A. Adding iodine B. Freezing C. Aeration D. Fixation

User Clweeks
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If you add 8-10 drops of iodine in water it will purify it.
User Fnky
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The answer is A, adding Iodine
User Juan Furattini
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